Navien NCB300-28K Installation & Operation Manual page 12

The following table lists the product information requirements (EU regulation No 811/2013 and No 813/2013)
Specifications
Condensing boiler
Low-temperature (**) boiler
B1 boiler
Cogeneration space heater
Combination heater
Rated heat output
Seasonal space heating energy efficiency
At rated heat output and
high-temperature regime (*)
At 30 % of rated heat output and
low-temperature regime (**)
At rated heat output and
high-temperature regime (*)
At 30 % of rated heat output and
low-temperature regime (**)
At full load
At part load
In standby mode
Standby heat loss
Ignition burner power consumption
Annual energy consumption
Sound power level, indoors
Emissions of nitrogen oxides
Declared load profile
Daily electricity consumption
Annual electricity consumption
Water heating energy efficiency
Daily fuel consumption
Annual fuel consumption
Contact details
(*) High-temperature regime means 60 °C return temperature at heater inlet and 80 °C feed temperature at heater outlet.
(**) Low temperature means for condensing boilers 30 °C, for low-temperature boilers 37 °C and for other heaters 50 °C return temperature (at heater inlet).
Specific precautions
Read the user's information and installation manual before the application is assembled, installed or maintained.
NCB300-28K
Unit
P kW
rated
η %
s
Useful heat output
P kW
4
P kW
1
Useful efficiency
η %
4
η %
1
Auxiliary electricity consumption
elmax kW
elmin kW
P kW
SB
Other items
P kW
stby
P kW
ign
Q
GJ
HE
L dB
WA
NO mg/kWh
x
For combination heaters
Q kWh
elec
AEC kWh
η %
wh
Q kWh
fuel
AFC GJ
Navien LTD, Building 2, Guildford Business Park, Guildford, GU2 8XH
NCB300-37K
YES YES
NO NO
NO NO
NO NO
YES YES
24 26
93 93
23.7 26.1
8.4 8.5
88.3 88.4
97.8 97.6
0.039 0.034
0.017 0.016
0.003 0.003
0.078 0.078
0 0
7.5 8.1
52 47
32.9 24.0
XL XL
0.183 0.168
39 36
84.1 83.9
23.2 23.3
18 18
NCB300-41K
YES
NO
NO
NO
YES
26
93
26.1
8.5
88.4
97.6
0.034
0.016
0.003
0.078
0
8.1
47
24.0
XL
0.182
39
83.1
23.5
18
About the Boiler 11